Kingdom Hearts is an action role-playing game series developed and published by Square Enix. It is a collaboration between Square Enix and Disney, featuring characters from various Disney franchises and Square games. The series centers on the main character Sora and his search for his friends and encounters with Disney, Final Fantasy, and The World Ends with You characters on their worlds. Varying merchandise related to the games include soundtracks, figurines, companion books, novels and manga series.